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Finding the Fourth Proportional to 668.76, 998.07 and 651.48

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Solution

The fourth proportional to 668.76, 998.07 and 651.48 is: 972.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.76 : 998.07 = 651.48 : x
  2. Step 2: Convert to fraction form
    668.76/998.07 = 651.48/x
  3. Step 3: Cross multiply
    668.76x = 998.07 × 651.48
  4. Step 4: Simplify right side
    668.76x = 650,222.64
  5. Step 5: Solve for x
    x = 650,222.64/668.76
  6. Step 6: Final answer
    x = 972.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.